<template>
  <div>全局组件hello</div>
  <div>全局属性：{{ $message }}</div>
  <p>求和：{{ sum }}</p>
  <p v-beauty="sum">好开心</p>
</template>

<script setup lang="ts" name="">
import { ref } from "vue";
let sum = ref(0);
</script>

<style scoped></style>
